Abstract
Chevron will convert the alkylation catalyst used in its Salt Lake City refinery from the toxic and corrosive chemical hydrofluoric acid to an ionic liquid. The planned switch takes ionic liquids a step closer to becoming mainstream materials and could presage big changes in the refining industry as well. The big oil firm began developing ionic liquids as alkylation catalysts in 1999 and has run a demonstration unit in Salt Lake City for the past five years. It plans to start building a full-scale alkylation plant next year. After the plant is completed in 2020, Chevron will remove all HF-specific equipment and its inventory of HF from the site. Ionic liquids, salts that are liquid at temperatures below 100 °C, have long fascinated chemists, but they have often seemed like a technology in need of an application. Two successful applications are BASF’s use of ionic liquids as acid-scavenging agents and
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